Triangle of Gaussian (or q-binomial) coefficients for q = -2.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-1a(5) =1a(6) =1a(7) =3a(8) =3a(9) =1a(10) =1a(11) =-5a(12) =15a(13) =-5a(14) =1a(15) =1a(16) =11a(17) =55a(18) =55a(19) =11a(20) =1a(21) =1a(22) =-21a(23) =231a(24) =-385a(25) =231a(26) =-21a(27) =1a(28) =1a(29) =43